netdev - Re: [PATCH v3 bpf-next 1/5] devmap: Formalize map value as a named struct

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Message-ID: <20200529180256.2e4d3940@carbon>
Date:   Fri, 29 May 2020 18:02:56 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     David Ahern <dsahern@...il.com>
Cc:     David Ahern <dsahern@...nel.org>, netdev@...r.kernel.org,
        bpf@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        toke@...hat.com, lorenzo@...nel.org, daniel@...earbox.net,
        john.fastabend@...il.com, ast@...nel.org, kafai@...com,
        songliubraving@...com, yhs@...com, andriin@...com,
        brouer@...hat.com
Subject: Re: [PATCH v3 bpf-next 1/5] devmap: Formalize map value as a named
 struct

On Fri, 29 May 2020 09:36:14 -0600
David Ahern <dsahern@...il.com> wrote:

> On 5/29/20 2:22 AM, Jesper Dangaard Brouer wrote:
> > We do need this struct bpf_devmap_val, but I think it is wrong to make this UAPI.
> > 
> > A BPF-prog can get this via:  #include "vmlinux.h"  
> 
> sure. I see that now.
> 
> I forgot to fold in a small update to the selftests, so I need to send a
> v4 anyways. I will wait until later in the day in case there are other
> comments.

I've just posted a patchset on top of this V3, that moves struct
bpf_devmap_val, and that demonstrate via code that I mean by
leveraging BTF for dynamic config API.

https://lore.kernel.org/netdev/159076794319.1387573.8722376887638960093.stgit@firesoul/

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer